Calculating-machine.



D.EPELF21. GALGULATING MAOHNE.

APPLICATION FILED DBU. i8; 1909.

10 SHEETS-SHEET 1.

Eatented May 23, 1911.

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D. E. FELT.

GALCULATING MAGHINE.

ANIMATION EILBD 930.15, 1909.-

Patented May 23, 1911.

10 SHEETS-SHEET 3.

D.E.PBLT.

GALGULATING MACHINE. APPLICATION FILED DE0.V18I, 1909.

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D. E. FELT.

CALGULTING MACHINE.

APPLICATION FILED DB0. Is, 1909.

I Patented May 23, 1911.

10 SHEETS-SHEET 5.

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D. E. 19E-LT.

GALcULA-"sm Mmmm.

APPLIUATION F/LED DEU. 1,`l909. I 992,95@Q f Mmmm May .03, EQ

10 SHEETS--SHEET 6.

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D. E. FELT.

GALGULATING MAGHINE.

APPLUTION FILED DEG. 18, 19(19.

I Patented May 23, wm.

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D. E. FELT. GALGULATING MACHINE. APYLIOATIOH FILED DEO. 18, 1909. 992,950 v Patented May 23,1911.

10 SEBBTS-BHEET 9.

[2g/z f A immcyg D. E. FELT. GALCULATIN'G MACHINE.

'ATPLIGATON FILED DBO. 1B, 1909.

Patented; May 23, 1911.

10 SHEETS-SHEET l0.

jizz/HM??? v6 im@ :DORE FELT, 0F CHICAGO, ILLINIS.

ALCULATNG-MACHINE.

Speecaton of Letters Patent.

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ipplcaton filed Beeember 1g, 1909. Serial No. 533,884.

ToV all whom it may concern:

Be it known that I, Donn E. FELT, a citizen'of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a neW and useful Improvement in Calculating-Machines, of

l which the following is a speeilication.

My invention relates to calculating-Inachines provided with keyboard-mechanism having a plurality of keys whose manipulation determines the amounts added; and the particular embodiment of the invention here shoWn'is an embodiment adapting said invention to a multiple-order key-driven duplexing calculating machine such as the Well known coniptometer set forth inl my prior United States lPatents blos. 762520, and 762521, of luneV 29, 199i, and @7107, of August 9, 1904i, and in U. S, Patent No. 960528, issued lune l", i919. The drawings particularly show i ention as embodied in a comptometer leaving the special construction forth, in my said patent. o

.The invention has for an object the providing of such a calculating-machine with a Signal. mechanism, as hereinafter claimed, cooperating' with the keyboard-mechanism and adapted to signal Athe operator, inde-- pendently of the apparent key-displacement, as soon as one of the keys is released ailter being incompletely manipulated; so that the operator may immediately correct such error. And the invention also hasA for an object the providing of such a calculatingmachine With "e locking-mechanism, as hereinafter claimed, cooperating 'with the keyboard-mechanism and adapted to loci; other orders of the keys' as soon as a key of one order is released after being incompletely manipulated; so that the operator may he prevented from proceeding with the computation Without correcting such error.

The invention also has for an object' the providing of such a calculating machine with a slop-mechanism, as hereinafter claimed, cooperating with the adding-mechanism and adapted check the addingaction as soon one ot the keys released after beingincompleta.; nninipumted; so that the operator may he enabled to correct such error by Simpl 'performing a. keymranipulation that Wifi effectthe intended addition. Andftheinvention also has for an object the providing of such a calculating-machine With 'an indicater-mechanism,

as hereinafter claimed, cooperating with the above mentioned signal-mechanism and adapted to indicate the denominational order in which a key has been released after oeing` incompletelymanipulated; so that the operator may be aided to immediately ascertain the key that has been incompletely manipulated. ind the invention also has for .an object the providing of such a calculating-machine with a resetting-mechanism, as hereinafter claimed, cooperating with certain ofthe above mentioned accessory mechanisms and adapted to reset such mechanism to normal; so that the operator may restore all the accessory parts to normal immediately that lie has corrected the incomplete manipulation ot a key. ind the invention also has for an object the providingof connections between such a resettingmechanism and 'the canceling-mechanism,v

in all of the figures, Figure l shows a top plan view oiu the mechanism of my invention as embodied in the calculating-machine of the type setforth in my above mentioned patent, th'e said ligure showing the machine with the case and hey-plate removed and the key-stems transversely sectioned, and with several ordinal` sections broken out of the middle of the machine longitudinally so as to permit the detailed mechanism to be shown on large a scale as the sheet. will accommodate; Fig. 2 is a longitudinal sectional view of. the machine,` taken on the line l--Z of Fig. il; lfipni a long iitudinal sectional view of thc forward portion 4oi the machine, taken on the line 553m?) olf F l, and on larger scale than Fig". 2, and showing the parts in normal posit'on, as they are also shown in llig. 2; l is s. b s a sectional view like lng', 3 but Showing l the parts in the positions they assume when one of -the keys of the keyboard is .completely, depressed; Fig. 5 is a 'detail of part of the mechanism appearing 1n Figs. 3 and 4, but showing the positions of parts of the signal and co-acting mechanisms at the instant when a key has been only partially depressed but not yet released, the key indicated being of the same digital rank as the one shown fully depressed in Fig. 4; Fig. G is the same as Fig. 5 except that the parts are shown in the position they take after the release, without completing the de` pression, of the key that Fig. 5 shows as partially depressed; Fig. 7 is a transverse sectional view, taken on the line 7 7 of Fig. 1; Fig. 8 is a transverse sectional view taken on the line 8--8 of Fig. 1; Fig. 9 is a fragmentary detail sectional viewkof the machine, taken on the line 9 9 of Fig. 1, to show parts ofthe resetting-mechanism cooperating with the above mentioned accessory mechanismsl and operatively. connected with certain members of the canceling- Vmechanism of the machine; Fig. 10 is an elevation of the right hand side of the machine with the side casing removed, to show the canceling-mechanism above referred to; Fig. 11 is a detail of one of the series of hook-levers that coact with the cancelingniechanism and release the trip-pawls, of

the signaling trip-mechanism, during the canceling operation. Fig. 12 is a detail of the same bell-striking mechanism shown in Figs. 5 and 6, but with some of the parts omitted to give a clearer view of such details; Fig. 13 is a detail of the same tripmechanism shown in Figs. 5 and G, but with some of the parts omitted to give a clearer view of such details; Fig. 14 is a detail perspective of one of the trip-pawls 44; Fig. 15 is a vdetail perspective of the trigger-arm 33; Fig. 16 is a detail front view of one of the trip-levers 38; Fig. 17 is a detail perspective of the bell-lever 2G; Fig. 18 is a side elevation of one of the stoplevers 55; Fig. 19 is a side elevation of one of the stop-levers 56.

20 is a signalbell, rigidly connected at 21 to the framemember 22 of the machine, and arranged to be struck by the clapper 24 Xed on the free end of the spring-stem 25 whose other end is rigidly secured to the forward edge of the bell-lever 26 that is pivoted to oscillate on the end of rod pivot 27 and is impelled by the bell-spring 28 stretched between the downwardly depending arm 29, of said bell-lever, and the downwardly extending projection 30 of the frame-plate 31 (see Figs. 9, 5, 6, 8, l). A rearwardly projecting arm 32 of said bell-lever is normally engaged by the free tip of the trigger-arm 33 that 'projects downward from the left lhand end of Vthe trigger rockbar 34 that is mounted transversely on the machine and adapted to be rocked, to release the bell-lever, by the depression of the trigger-rod 35 that parallels said rock-bar and is supported in the free ends of the rockarms 36 that project forward from and are secured to said rock-bar at intervals across the machine (see Figs. 1, 2, 3, 4, 5, G, 9). This trigger-rod 35 is normally held raised by the spring 37, and is depressed by any one 0r more of the ordinal series of triplevers 38, one for each ordinal place, that are mounted to oscillate on the rod 27 that is supported in the frame-plate ears 39 and positioned transversely above the series of column-actuator segment-levers 40. Each of these trip-levers 33 has a rearwardly projecting arm441 whose free tip stands normally slightly above the aforesaid triggerrod 35 and is adapted to rock the triggermechanism by being pressed down upon said trigger-rod; and each of said trip-levers has a forwardly projecting arm 42 whose forward end carries a lateral stud 43 upon which is swung the depending trip-pawl 44 whose free lower end has its forward edge 45 adapted to engage thesaw-toothed ratchet 46 that is secured to and projects upward from the corresponding column-actuator segment-lever 40. A. spring 47 attached to the downwardly projecting tip 48, of said trip-pawl, constantly presses-said pawl t0.- ward engagement with the teeth of said ratchet. Vhen'the depression of a key, such as 49., depr'esses the corresponding columnactuator segment-lever, the said trip-pawl wipes over the inclined faces of/the teeth of said ratchet member as the latter descends, dropping into these successive tooth spaces as they pass. And if the key `is released, and the segment-lever thereby permitted to lift, while'the trip-pawl so occupies any one of the tooth spaces of the said ratchet member, the abrupt horizontal edge of the corresponding ratchet tooth will engagel the under side of the forward edge of the depending end of the said trip-pawl and bodily lift said pawl and, with it, the aforesaid triplever arm on which said trip-pawl is mounted; and such lifting of the'forwardly projecting arm of said trip-lever will of course canse a corresponding depression of the rearwardly projecting arm of said trip-lever, and thereby cause the tripping of the belltrip mechanism, with the result that the bell will be rung (Fig. G). To prevent this from happening 'when the column-actuator has been properly depre' ied by the complete depression of the key manipulated, there are provided certain arrangements for swinging and holding the trip-pawl entirely out of contact with the aforesaid ratchet member during the return or upward stroke made by the column-actuator segment-lever. when the operator releases a key that has been depressed to the complete extent required for has caused the trip-pawl to. be swung back `the adding oi the amount indexed on such tending arm 50 that normally rests against the under side of the short stop-stud 51 fixed in the trip-lever somewhat forward of the stud on which the trip-pawl swings, and this arm 5t) of the trip-pawl has hooked over it, and normally standing above it, the forwardly` hooked upper ends 52 of the arms 53, 54 that proj eet upwardly from the respective odd and even stop-levers 55, 56 that act to stop or limit the downward movement of the column-actuator segment-lever of corresponding order, Said stop-levers being the stop members that are normally thrown into action just at the` conclusion of the down stroke of any ot the keys in the normal aetnation of the machine of my aforesaid prior patents. The normal depression of oneof these stop-levers 55 or 56, just at the conclusion of the down stroke of a key in the correspending order, will cause the aforesaid hook 52 of the 'upwardly projecting arm, of such stop-lever, to abruptly descend upon and depress the aforesaid arm 50 of the trip-pawl, thereby swinging backward the depending lower end of said trip-pawl to a position entirely clear of the aforesaid ratchet member of thecolumn-actuator seg-v ment-lever (see Fig. Ll). This backward swinging of the trip-pawl is limited by the cont-act ot' its rear edge with the transverse rod. 57 g and just as the pawl reaches such limit 'of its rearward swing, the latch 58, which is pivoted on transverse rod 59, and Whose free end has been resting on top of the transverse member of the lower end of the trip-pawl, drops in front of. the forward edge of said member of the trip-pawl and so holds it,'in its rearwardly swung position, while the ratchet member of the segmentlever is making the ensuing 11p-stroke. This latch 58 has its free end constantly pressed downward by thejtensio'n of the same spring'` 47, that tends to draw the trip-pawl tor- 'ard, the said spring being stretched between the projections that are respectively integral with the said trip-pawl and latch;

and said latch prevented from dropping too 'far downward, by a rearwardly project-ing tip G0 that engages the same transverse rod that limits the backward swing of the trippawl; and 'the same rod also prevents the trip-pawl from rising, while the said trippawl is in the backwardly swung position, since 'a rearward projection @l from the lower end of said trip-pawl is at that time engaged under the said rod (see Fig. fl).

Just at the conclusion of the rip-stroke ot ,the column-actuator segment-lever, after the proper 'and complete depression of a key and engaged by the latch in the manner just described, the latch is struck and lifted by a projection 62, carried by the said segmentlever, and the trip-pawl is thus released from its engagement with the said latch and so permitted to drop back into the normal position shown in F ig. During such com plete up-stroke of the column-actuator, the aforesaid latch'is required to hold the trippawl back, out of engagement with the ratchet member, because the stop-lever 55 or 56, whichever happens to have been actuated by the particular key that has been fully depressed,"completely rises at the very beginning of the up--stroke of such key, and such rise of said stop-lever of course lifts its hook end 52 entirely free of the transverse arm 50 of the trip-pawl, restoring the'said stop-lever to itsV normal raised position (Fig. Then the completion of the upstroke of the column-actuator lifts the latch 5S and permits the trip-pawl to spring for ward, under the tension or" its spring 47, the said trip-pawl and-the trip-lever arm that bears it are prevented from rising, both because of the downward pull et the said spring 4T and because the extreme tip of the tr1p-pawl`s rearward projection 61 remains slightly engaged under the transverse rod 57 (Fig. 3), and the trip-pawl never moves forward entirely clear ot' said transverse rod except when a tooth of the ratchet member of the column-actuator is presented in front oi the engaging'. edge of the lower .end of said trip-pawl (Figs. 5 and 6). Thus the trip-pawl vand the trip-lever arm that bears it are held in their depressed position, and the/trip-lever prevented from tripping the bell-lever mechanism, when the machine is at normal (Figs. 2, 3). But when the trippaWl and .its trip-lever are lifted, in the kmanner before described, when a key has been released after being only partially de,- pressed, the rise of said trip-lever arm, bearing the said trip-pawl, is limited by the upper lip G3 ofthe recessed projection 64 of the frame-plate G5 adjacent to said triplever, said lip G3v being struck by the studcollar 6G on the base of the stud on which the trip-pawl is swung, said stud being, as before stated, a lateral projection from the trip-lever, and said coilar being interposed between said trip-lever and .the said trippawl borne on said trip-lever stud. During any up and down movement of the said trip-lever and its said stud, bearing the trippawl, the said collar travels in the aforesaid recess of the frame-plate projection -G-l, and any. extreme downward movement is limit ld by the lower lip 67 that forms they under side of said recess n1 the frame-plate` projectlon 64. The trip-lever arm bearing' the trip-pawl never rises highv enough to permit the trip-nawl to rise' above the transverse rod 57.

When the trip-lever arm, bearing the trippawl, is thrown upward, by reason of the 'so f failure of the operator to completely depress the key manipulated, an upwardly projecting tongue 68, at the forward end of said trip-lever arm, is thrust upward through the slot 69 in the key-plate 70; and this tongue, thus thrust out above the keyplate, serves to indicate visually the particular denominational order in which the operator has failed to properly depress a key. And from such indication of the denominational order concerned, the operator is immediately able to determine the particular key, in that order, because he has only -to notice the digit that appears in the same denominational place of the written item that he was intending to add when he failed to press the key all the way down. For instance, if he had intended to add the item 6752, and the indicator tongue is thrust above the key-plat-e in the hundreds denominational order or row of keys, he immediately knows that it was the 7 key, in the hundreds order, that he lfailedy to completely depress. This indicator-mechanism thus enables him to proceed immediately to correct th error, the signal-mechanism having signaled him, by the ringing of the bell, as soon as the error was committed.

The simplest and most immediate manner of correcting the error of having failed to properly depress a key, would be to complete the depression of such key, if this may be done without falsifying the computation that is in progress. But to permit such a manner of correcting such error, it is necessary that a merely partial depression of a key shall not advance the reading of the numeral-wheel in the denominational order l inwhich the key so manipulated is located.

To this end there is provided, in the particular machine shown 1n the accompanying drawings, an accessory stop-mechanism, co-

operating with the adding-mechanism and "with the above-described signal-mechanism.

Each trip-lever 3S has, below its axis of oscillation 27, a downwardly projecting/arm 7l pivotally connected, at its lower extremity 7 2, with a forwardly extending link 7 5l whose forward end is pivotally connected, at 74, to the middle part of a swinging stopdetent 75 whose upper end is pivotally mounted on the transverse rod 76 and whose depending lower end terminates in a for- 'wardly projecting,detent-tipV 77 that is arranged to engage the lantern ratchet 79 of the driving-gear S0 for the numeral-wheel 81 of the corresponding order, such engagement of said detent with said lantern ratchet taking place whenever the detent is swung forward, and operating to stop any further advance of the said numeral-wheel of that order (Figs. 5, 6, 3, 4).' Such forward swinging of the detent, thus preventing the numeral-wheel movement, results from the forward swingingof the Said link 73 when the said. depending arm 71, of the trip-lever,l

held before the up-stroke of the corresponding column-actuator segment-lever 40 Ahas advanced the said lantern ratchet far enough to permit the back-stop 82 to drop in behind the next following spoke of said lantern ratchet, and also before such segmentlever shall have turned its pinion 83 far enough forward to advance the internalratchet 84 a full tooth space,-so that the numeral-wheel 81 shall not have been advanced a full numeral space and cannot make a complete one-space movement until a subsequent complete column-actuator movement is effected by the complete manipulation of the same or a higher key in that order, such subsequent complete keymanipulation acting initially, as above described, to release the trip-mechanism and the stop-detent 75 and so permit the numeral-wheel lantern-ratchet to spring back, under the tension of the carrying-spring 85, from its partial one-space displacement to its original position, ready to receive the normal adding-throw. So, as a result of the action of the just described stop-mechanism, if the operator has failed to completely depress any key in a given order and then afterward completely manipulates the sameof the keys will have left no effect whatever I on the final reading on that numeral-wheel.

Thus, when the signal-bell signals the operator that he has failed to completely depress a key, he corrects such failure byproperly depressing the same key. And if by any chance he does not .know the digital index of the key he fumbled, he is certain to correct any error the fumble has injected into the reading, if he strikes the 9 key (the key of longest stroke) in the order that the indicator-tongue 68 indicates, and afterward subtracts 9 and strikes the intended key in that same order. Such a subtraction of 9 is of course effected in the -usual manner of subtracting 9 on a calculating-machine of this type,-by the ordinary rule for i subtraction. In any instance where a plurality of misstrokes have been simultaneously made' by simultaneous partial depression of keys in a plurality of orders, in

attempting to perform the usual duplexing operation of the duplex comptometer,

the correction of such multiple error would be effected by a mere expansion of the same rnle correcting eaeh column in which a misetroke has been indicated by an indicator` tongue 68.

rlofurther prevent the `operator from failing to promptly Correct a misstroke that has been signaled to him7 as above described, it is provided that as soon as the misstroke oecnrsin any orderj all of the keys in all o1c the other orders of the machine in which no n'iisstroke has oeeurred will be locked from making any further movement whatever until after a key has been fully depressed in each order where a misstroke has occurred, and until after the signal mechanism has been reset to normah This of course also means that misstrokes could not be made in a plurality of orders without intervening correction oi each, unless the plurality of keys miaetruck were simultaneonsly depressed. lt is also ynovided that the same. locking mechanism shall etl'eetthe looking of all the keys in the order where misstroke occnrrech but not until after the operator haseorreeted the nnestroke by Cil eon'igletely manil'inlating a key in that order. A rocking lock-plate 80 Suspended transversely of the machine above the columnaetfiators, its ends being jonrnaled to rock in the side frame-plates of the machine, the y'said plate depending from the aXiS on which swings {Figs.- 8, .3, (l, 2, 3, The low-er `Y`lge of said rocking `lock-plate is provided with a rearwardly projecting flange 87 adapted to engage the delient pointe 8S of the series of lock-pawls 89 that are pivotally mounted on the series of column-actuator segment-levers 40, one of said lock-pawls being pivoted on the stud 90 on' each out said segn'ient-levers. The look-plate is constantly pressed toward the said series of lock-panday by the Same spring` 3T, that tends to hold the trigger device at normal. Bind when the signal-mechaniem is at normal, the said leekplate is held roeked forward Clear of said loeking-pawls, by the stud lll projecting laterally inward from the a in 92 of the belllever 26 and engaging the olllset left end of said lock-plate; and the rocking ot said.

bell-lever, when the bell-mechanism is tripped, releases the said leek-plate and permits it to spring rearward into 'jiosition to engage as aforesaid `die loeking-pawls on the segn'ient-levers. Sueh engagement, however, can only take place when the segmentlevers are at normal, ae any depression of any segment-lever will have brought the detent-tip of its loeking-pawl down below the plane of possible engagement with the flange on the .lower edge of the said locking-plate. lt the depression oit any segment-lever@ has been considerable,' the top of its locking-pawl 89 will have been carried entirelybelo'w the path oil' the looking flange of the said look,- ing-plate; but if the depression of any 'segment-lever 4G has been only very Slight,` and the locking-plate is then released by the tripping of the signal-mechanism7 the .tr-ee edge of the rearwardly projecting llange along the bottom ot said looking-plate willstrike against the forward edge 93 of the detenttip of the Said locking-pawl, and thereby press the said locking-pawl slightly backward without displacing the locking-plate from operative engagement with the lockingpawls on any of the 'other scgment-leif'ers,-. 'such backward pressing ot any one or more entirely below the said locking-plate, and4 the said locking plate is tripped into engagement with the locking-pawle on other eolnrnn-aetnators, the subsequent rise ot the depressed column-actuator to normal will not displace the locking-plate from its said Yja nient, but the locking-pand on the ris-I ing eolun'm-actualor will simply Springbackward as the forward edge of the detentl'ip ot said pawl rides oaer the flange edge of the locking plate (Fig. G). The spring Sfilot eaeh locking-pawl normally presses Such pawl vforward against the stop-stud 95 laterally projecting from the segment-lever e() on whichthe pawl is pivoted, the said spring having its fixed end secured in the hole D6 in the same segment-levenjust behind the pawl. And the rearward rocking ot' said pawl is limited by the bent tip 97 projecting from its lower end and curved under the lowerve'ilge of the segment-lever so as to engage said edge when the pawl is rocked backward. The locking of any ment-lever el), by the engagement of its locking-pawl with the loeking-l'ilate, ot course prevents the (lepre sion ot any of the keys in the eolumn ot keys that normally operate said segment-lever.

The trip-mechanism in any column isreset to nornnil7 as above described, by the complete depre. sion and release ot a key in that column. lint such resetting of the tripmechanism does not resetho normal either the bell-lever 2&3 or locking-plate 86. To re- -set vthe bell-loyer QG t normal there is provided an acoeesorykey 98, at the lefthand side ot the machine, the said key having the basent ils key-sl'en'i vertically slotted, at 99, and the said slot engaging a stud 100 that is (Figs. 8 and 9). The Said accessory or resetting key 98 normally held raised by the spring 101 whose fixed end is secured to the Stud 102 on the side frame-plate ot' the machine and whose free end engages the key-stem of said key just below the key-plate of the machine. When the bell-lever is at normal the stud 100 is positioned in the lower free end of the key-stem slot 99, but when the bell-lever has been tripped the said stud is thrown up toward the apeX of said slot and the depres sion of the saidv key will then rock the belllever downward into the normal position where the free tip of the rearwardly projecting arm 32 of said bell-lever engages the free tip of the trigger-arm 33, such engagement holding the bell-device set ready for another tripping. Such rocking of the said bell-lever 2G back to normal `also swings forward the stud 91 carried by the arm 92 of said bell-lever, and this forward movement of said stud 91 presses the locking-plate 86 forward clear of all the locking-pawls 89 of the segment-levers L10. Thus the depression of the resetting key 98 resets to normal both the belldevice and the locl ingtlevice, provided the triggcr-arm 83 has previously been returned to normal by lthe resetting of stroke', so in such a calcul any lripmcchansm that had been tripped f by the incomplete manipulation of any key, l such resetting of the trip-mechanism belng effected by properly striking the proper key in each-eolumn where a key was misstruck.

It will niow be evident that if the operator incomplctely manipulates any key in any column or columns, the bell of the signalmechanism will immediately ring and simultaneously all of the other ordinal columns of keys will be locked. And the proper-,striking of thc key in cach column then requiring correction will lock that column also, until, the signal-bell is reset. And the signal-bell can not be reset until a proper key-stroke has reset the trip-mechanism in each column'where a fumble has occurred. Incidentally it lmay be here remarked that a key is rarely fumbled. and incomplctely depressed, by any except a wholly inexperienced operator, as it is found use of a the oper; .fr down 'their full ating-machine the main utility of thc above described mechain practice that after a few da key-o1i eraled calculatn i gm ator always strikes the k:

nism is `the discipline it affords an inexperi enced'operator, and an, operator will rarely have occasion to Ause it at all after he has hada few days ractiee in making computations on ,auch a calculating-machineD Y l ln older to fprovidc that the normal actuation of the canccling-mechanism of the calculatingln'nichine shall@ reset to normal all of the mechanism in themachine, all, ol' the above described accessory mechanisms are arranged to'bc reset by, and incidentally to, the normal actuation of the canceling-mechanisin of the machine. Such arrangement also makes it possible for the operator to4 remedy a fumble, of any Akey or keys, by

simply operating the canceling-handle of the machine, and thiswill frequently be the most expeditious method when the fumble has been made before the computation in progress has proceeded too far. lVhere the computation has proceeded at considerable Y length before the fumble occurred,- it might of course be undesirable to cancel the register and so the previously described method of correctioncf the fumble would be preferred.

The canceling-mechanism of thehmachine shown in the accompanying drawings has the same canceling-action as thatl described y in my aforesaid U. S. Patent 960,528, issued June 7, 1910. The very beginning of the rearward throw of the canceling-handle causes the canceling-stops 103gto be thrown forward, as explained in my'said patent. (Fig. 10). And this forward throw of said canceling-stops is utilized, in my 4present invention, to insure the unlocking, atthe very beginning of the canceling-action', of any column-actuator segment.- levers that may have been locked byfalhe lockingplate 86.

To this end the canceling-stop 103 at the left hand side of the machine has pivotally connected to it, atflOLil' the link member 105 that leads back to and is supported on t-he frame-plate stud 106 that is engaged in the horizontal slot 10'( in the rear end of said link 'member (Figs. 5, 6) and the said link member has at its rear end an upwardly extending arm 108 whose apex isarranged to engage and press forward the locking-plate -86 when the said link member 105 is drawn forward by the aforesaid forward throw ofithe canceling? stop 103. This forward pressing ofi' the locking-plate moves said plate clear of all engagement with the locking-pawls 89, if said pla-te happened to be in position to engage any of said pawls ,at the beginning of the operation of the canceling-handle 109.

'The further rearward movement of the canverse bar 110 of the canceling-mechanism, 1s

caused to reset all of the hereinabove described trip-mechanism to normal,the movement of the column-,actuator segmentlever, in'any column where the trip-mechanism hasbeentripped,.having the same effect as if the saidy column-actuator had been actuated by one of its own keys. But as no key movement accompanies this actuation of the column-actuator segment levers bythe canceling-mechanism, none of the stop-levers 55 or 56, whose upwardly eX- tended hooked arms 53 or 54 engage the arms 50 of the trip-pawls, are moved; and so there are provided a` series of accessory hook-levers 111, swung on the same axis with the segment-levers 40 and having forward hook-arms 112 hooked over the arms 50 of the respective trip-pawls, the said accessory hook-levers 111 being arranged to co-act with the transverse bar 110 of the canceli11g-mechanism. (Figs. 2, 3, e1, 7, 8, 11). This co-actien is etfected by the contact of said transverse bar 110, as it descends, with the upward projection v113 on each of said accessory hook-levers 1111; and to the end that these liooleleivers may have .their hook ends drawn downinto engage ment with the trip-pawls soon as the transverse bar 110 of the canceling-mechanism begins to descendit is arranged that the said up 'ard projections 113 shall normally stand in immediate Contacty with the under edgel otl said bar 110', each of said levers 111'being constantly pressed upward,

toward said bar 110, by a sprii'ig 114 whose upper end is looped over the transverse rod 115 otl the machine, j the movement of the canceling-handle 109 shall reset the bell-lever QG to normal, said bell-lever is provided with an additional lateral stud 11G engaged in a slot 117 in the forward end of a link 11S that leads-back to and is pivotally connected on the crank arm 119 on the left hand end of the cranksha'tt 121) et the cancelinghamlle 109. lihen the hell-lever 20 and the cancelinghandle 109 are both at normal, the said stud 1113 will be positioned in the forward free end ot the said slot 117: but when the belllever QG has been tripped. to strike thebell, the said stud will he. shiited to the rear or closed end ot said slot .117 and then any subsequent forward throw of the crank-arm 110, by the rearward throw ol cancelinghandlc 109, will cause said link 118 to carry said stud 116 forward, rocking the belllever 21S bark into its normal position. And the said belldever will then have its arm 3Q caught and held by the trigger-arm 32S. because the trigger-mechanism will. have been back to normal by the resetting ot the trip-mechanism during the just above described beginning of the operation of the canceling-meehanism of the machine. Whatever displacement any of the numeralwheels may `have suffered through any .tumbling of an)T of the keys, the operation of the canceling-mechanism, by the ordinary back and forth stroke of the cancelinghandle 109, will result in resetting all of the To the further end that parts or une machine at normal, with all of the numeral-Wheels at a. reading of 0, at the conclusion of the canceling-action.

It will be noted that, inthe machine here shown, although the signaling-mechanism signals the operator, independently of the apparent keydisplacement, as soon as a key has been ineompletely manipulated, the said key is left free to have its manipulation completed utter such operation of the signaling-mechanism. This provision, in the particulail embodiment of my invention here shown, precludes the possibility, objectionable in the `particular form of machinehere shown, of preventing the operator from immediately completing the manipulation of a key that he has failed to completely manipulate.

My invention is hereinabove set t'orth as embodied in one particular torni of construction, but I do not limit it thereto or to less than all the possible forms in which the invention t hereinafter claimed may be embodied and distinguished from prior devices.

I claim z-- 1. ln a calculating-machine. in eombina tion adding-meelianism a keyboard-mechanism having a plurality of keys whose manipulation determines the amounts added; and a signaling-mechanism cooperating With said `keyboard-mechanism and adapted to signal the operator,,independently et the apparent key-displacement, as soon as one of said keys is released after being incompleteiy manipulated; substantially as speci-l lied. y

:2. In a calculating-machine, in combination addinganechanism a keyboard-mechanism havingl a plurality of keys whose manipulation determines the amounts added; anda lockirig-mechanism coperating with said keyboardniechanism and adapted to lock only others ot said keys as soon as one of the keys is released after being incomy pletely manipulated, said key being free and returned to normal;substantially as speci- Hed.

3. ln a calculating-machine, in combination: adding-meehanism a. keyboard-namhanism having al plurality of keys whose manipu lation determines the amounts added; and a st(ip-mechanism cooperating with said keyboard-mechanism and adding-mechanism and adapted to check the adding-action as soon as one of said keys is released after being incompletely 1m1nipulated; substantially .as specified.

.4.. ln'a calculating-machine, in combination: adding-mechanism, a. keyboard-mechanism having a. plurality of keys whose i'nanipulation provides'the power ttor drivingsaid adding-mechanism; and a signaling-mechanism cooperating with said key board-mechanism and ladapted to signalthe operator, independently of the apparent keyy lated; substantially as speeiied.

manipulation provides the power for drivfied.

tion: adding-mechanism; aA multil'ile-orderl displacement, as soon as one of said keys is released after' being inconipletely manipu- 5. In a calculating-machine, in combination adding-mechanism; a keyboard-mechanism having a plurality of keys whose manipulation provides the, power Jfor driving said adding-mechanism; and a lockingmechanism eoperating with said keyboardmechanism and adapted to lock only others of said keysas soon as one of the keys is released after being ineompletely manipulated; said key being free and returned to normal; substantially as specified.

6. In a calculating-machine, in combination: adding-mechanism; a keyboard-mechanism having a plurality of keys whose ing said adding-mechanism; and a stopmechanismcoperating ivitl'i said keyboardmeehanismand adding-mechanism and adapted to cheek the adding-action as soon as one of said keys is released after being incompletely manipulated; substantially as speciied. i'

7. In a calculating-machine, in combinakeyboard-mechanism having a multiplicityof denominational orders of keys whose manipulation determines thea'mounts added; and a signaling-mechanism cooperating with said keyboardmechanism and adapted to signal the operator; independently of the apparent key-displacement, aswsoon as one of said keys is released after being incompletely manipulated; substantially as speci- 8. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a multiplicity of denominational order of keys whose manipulation determines the amounts added; and a locking-mechanism eoperating with I said keyboard-mechanism and adapted toy lock other orders'of said keys as soon as a key of .one order is -released after being' incompletely manipulated; substantially as specified.

9. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a multiplicity of, denominational orders of keys whose manipulation determines the amounts added; and a stop-mechanism cooperating with said keyboard-mechanism and adding-mechanism and adapted to cheek the adding-action as soon as one of said keys is released after being ineompletely manipulated; substantially as specitied. y

`10. In a calculating-machine, in combinationi adding-mechanism; a multiple-order keyboartl-mechanism having, a multiplicity of denominational orders of keys whose manipulation provides the power Jfor driving said adding-mechanism; angl a signaling-mechanism. coperating with said keyboard-mechanism and adapted to signal the operator, independently of the apparent keydisplacement, as soon as one of said keys is released after being ineoinpletely manipulated; substantially as specified.

11.. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a multiplicity of denominational orders of keys Whose manipulation provides the power for driving said adding-mechanism; and a lockingmechanism cooperating with said keyboardmechanism andadapted to lock other orders Aof said keys as soon as a key of one order is 'released after being incoinpletely manipulated; substantially as specified.

l2. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a multiplicity of denominational orders of keys Whose manipulation provides the power for driving said adding-mechanism; and a stop.

mechanism coperating with said keyboardmechanism and adding-mechanism and adapted to check the adding-action as soon as one of said keys is released after being incoinpletely manipulated; substantially as specified.

13. In a calculating-machine, in combination: adding-mechanism; a keyboard-mechanism having a pluralityI of keys whose manipulation determines the amounts added; a signaling-mechanism eoi'perating with said keyboard-mechanism and adapted to signal the operator, independently of the apparent 'key-displacement, as soon as one ot said keys is released 'after being incompletely manipulated; and a locking-mechanism actuated by said sign:lling-mechanism; substantially as specified.

14. In a calculating-machine, in combination: addiiig-mechanism; a keyboard-mechanism having a plurality of keys Whose inanipulation determines the amounts added; a signaling-mechanism cooperating with said keyboard-mechanisin and adapted to signal the operator, independently of the apparent key-displacement, as soon as one of said keys is released after being incoinpletely manipulated; and a stop-mechanism actuated by said signaling-mechanism; substantially as specified. Y

15. In a calculating-machine; in combinaton: adding-mechanism; a keyboard-mechanism having a plurality of keys Whose manipulation determines the amounts added; a signaling-mechanism coperating with said keyboard-mechanism and adapted to signal the operator, independently of the apparent key-displacement, as soon 'as one of said keys is released after being ineompletely manipulated; a locking-mechanism actuated by said signaling mechanism mechanism actuated by said signaling-mechanism; substantially as specified.

16J In a calculating-machine, in combinaand a stopvtion: adding-mechanism; va keyboard-meehing ineompletely manipulated; substantially as specified.

18. In a calculating-machine, in combination adding-mechanism; a multiple-order keyboard-mechanism having` a multiplicity or' denominational orders of keys Whose manipulation determines the amounts added;

and a bell-mechanism eoperating With said keyboard-mechanism and adapted to signal the operator as soon as one of said keys is `released -after being incompletely Vmanipulated; substantially as specified.

19. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a multiplicity of denominational orders of keys Whose manipulation provides the power for driving said adding-mechanism; and a bell-mechanism eoperating With said keyboard-mechanism and adapted to signal the operator as soon as one of said keys is released after being incompletely manipulated; substantially as specified.

20. In a calculating-machine, in combination: adding-mechanism; a multiple-order keyboard-mechanism having a'plurality of keys Whose manipulation determines the amounts added; a signaling-inechanisin cooperatingA With said keyboard-meehanism and adapted to signal the operator; independently of the apparent key-displacemcnt, as soon as one of said keys is released after being incompletely manipulated; and an indicator-mechanism coperating with said signalilig-mechanism and adapted to indicate the order in which said key has been so manipulated; substantially as specified.

2l. In apcalculating-machine, in combination: adding-mechanism; a multiple-order keyboardmechanism having a plurality of keys Whose manipulation determines the amounts added; a signaling-mechanism cooperating with said keyboard-meehanism and adapted to signal the operator, independently of the apparent key-displacement,

stantially as speciied.

rmechanism actuated by said assoon as one ofsaid keys is released after being` ineompletely manipulated; and an indicator-mechanism, havinga visible indicator.. cooperating with said signaling-mechanism and adapted to indicate visually the order in which `saidkey has been so manipulated; substantially as speciiied.

22. In a calculating-maehine; in combination: adding-mecluinism; a keyboard-meehanism having a. plurality of keys whose manipulation determines the amounts added; and a signaling-mechanism cooperating with said keyboard-mechanism and adapted to signal the operator, independently oi the appaia-ait key-displacement, as soon-as one of said keys is released after being incompletely lnaniliulated; said signaling-mechanism heilig provided with a resetting-device adapted to reset its signal to normal; sub- 23. In a calculating-machine, in combina` tion: adaling-mechanismg a keyboard-mechanism havin'g a plurality of keys Whose manipulation determines the amounts added; a signaling-inechanism coperating with said keyboard-mechanism and adapted to signal the operator, independently of the apparent key-displacement, as soon as one of said keys is released after reing incompletely manipulated, said signaling-mechanism being provided with a resetting-device adapted to reset its signal to normal; and a lockinganism and provided With a resetting-device adapted to reset the locking member to normal; substantially as specified.

24. In a calculating-machine, in combination: adding-mechanism; canceling-mechanism; a keyboard-mechauisin having a plurality of keys Whose manipulation determines the amountsadded; and signalingmechanism coperating with said keyboardmechanism and adapted to signal the operator, independently of the apparent keydisplacement, as soon as one of the said keys is released after being incompletely n'ianipulated, said signaling-mechanism beingy provided with connections leading to said canceling-mechanism and adapted to permit said signailing-mechanism to be reset to normal by the :uctuatio'n of the said canceling-mechanism; substantially as specified.

,25. In a celculating-niachine, in combination: adding-mechanism; canceling mechanism; a keyboard-mechanism having` a plurality ot' keys whose manipulation determines ihe amounts added; and a lockingmcchanism coperating with said keyboar mechanism and'adapted to lock other orders of said keys as soon as a key of one order is released after being incompletely manipulated, said loeking-mechanism being` provided with connections leading to said canceling,-nieehanism and adapted to permit said locking-mechanism to be reset to norsignaling-mech-l mal by the actuation of the said cancelingmechanism; substantially as specified.

26. In a calculating-machine, in combination: adding-mechanism; canceling mechanism; afkeyboard-mechanism having a plurality oi keys -whose manipulation determines the amounts addedg'and a stop-mechanism eoperating with said keyboardmechanism and addingmechanism and adapted to check the adding-action as soon as one of said keys is released after being incompletely manipulated, said stop-mechanism also cooperating with said cancelingmechanism and being adapted to be reset to normal by the actuation of the saidcancel- .ing-mechanism; substantially as specified.

27. In a calculating-machine, in combination: adding-mechanism; canceling-mechanism; a keyboard-mechanism having a plurality of keys Whose manipulation determines the amounts added;asignaling-mechanisrn eoperati-ng With said keyboard-mechanism and adapted to signal the operator, independently ot the apparent key-displacement7 as soon as one of said keys is revleased after being incompletely manipulated; a locking-mechanism actuated by said signaling-mechanism; and a stopmechanism actuated by said signailing-mechanismg said signaling-meehanism and loekii'ig-meehanism and stop-mechanism being provided' with connections leading to said cancelingmeehanism and adapted to permit all et the three aforesaid mechanisms to be reset Ate normal by the actuation ot the said canceling-mechanism; substantially as speeilied.

Q8. ln a calculating-machine, in combination: adding-mechanism having carryingdeviees adapted to permit said adding-mechanism to receive prime aetuations in a plurality of orders simultaneously; a multipleorder keyboard-mechanism having a multiplicity of denominational orders ot keys Whose manipulation provides the power -or driving said adding-mechanism; and a signaling-mechanism cooperating with said keyboard-mechanism and adapted to signal the operator, independently ofthe apparent key-displaeemenas soon as one of said keys is released afterlbeing inco-mpletely manipulated; substantially as specified.

29. In a calculating-machine7 in combination: adding-mechanism having. carryingdevices adapted to permit said addingmeehanism to receive prime actuations in a plurality of orders simultaneously; a multiple-order keyboard-mechanism having a multiplicity of denominational orders of keys Whose manipulation provides the power for driving said adding-mechanism; and a bell-mechanism cooperating withsaid keyboarel-mechanism and adapted to signal the operator as soon as one of said keys is released after being ineompletely manipulated; substantially as specified.

30. ln a calculating-machine, in combination: adding-mechanism having carryingdevices adapted to permit said adding-mechanism to receive prime actuations in a plurality of orders simultaneously; a multipleorder keyboard-mechanism having a multiplicity ot denominational orders of keys Whose manipulation provides the power for driving said adding-mechanism; and a locking-mechanism cooperating with said keyboard-mechanism and adapted to lock other orders et' said keys as soon as a key of one order is released after being incompletely manipulated; substantially as speeied.

Bl. In a calculating-machine7 in combination: adding-mechanism having carryingdevices adapted to permit said adding-mechanism to receive prime actuations in a plu.-

incompletely manipulated; substantially as specified.

32. ln a calculating-machine,,in combination: adding-mechanism having carrying-devices adapted to permit said adding-mechanism to receive prime actuations in a plurality oit orders sin'iultaneously; a multipleorder keyboard-mechanism having a multiplieity of denominational orders of keys whose manipulation provides the power for driving said adding-meehauism5 a signalnig-mechanism cooperating with' said keyboard mechanism and adapted to signal the operator, independently of the apparent key-displacement, as soon as one oit said keys is released after being incompletely manipulated; and a locking-mechanism actuated by said signaling-mechanism; sul,- stantially as specified.

8E. In a calculating-machine, in combination: adding-mechanism having carryingdevices adapted to permit said adding-neenanism to receive prime aetuations in a plurality of orders simultaneously; a multiple-order keyboard-mechanism having a multiplicity of denominational orders of keys whose manipulation provides the power for driving said adding-mechanism; a signaling-mechanism cooperating With said keyboard-meelianism and adapted to signal the operator, independently 'of the apparent key-disp]acement, as soon as one of said keys is released after being incompletely manipulated; and a stop-mechanism actuated by said signaling-mechanism; substantially as specied.

34. lin a calculating-machine, in combination: adding-mechanism having carrying- 

